Abstract

Čerenkov radiation is generated as an unwanted background when optical fibers carrying signals pass through radiation fields. The angular dependence of the intensity of Čerenkov radiation transmitted in silica-core fibers was measured using 6 and 12MeV electron beams from a Varian Clinac accelerator. These confirmed theoretical predictions that the angular variation of Čerenkov radiation transmitted along optical fibers depends only on the refractive index difference Δn between the core and the cladding, and that the peak intensity is proportional to the cube of the fiber core radius.

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